Table 2 Quality Assessment of Reviewed Case-Control Studies.

From: Parity and endometrial cancer risk: a meta-analysis of epidemiological studies

Study

Case defined with independent validation

Representativeness of the cases

Selection of controls from community

Statement that controls have no history of outcome

Cases and controls matched and/or adjusted by factors

Ascertain exposure by blinded structured interview

Same method of ascertainment for cases and controls

Same response rate for both groups

Overall Score

Parslov, 2000

1

1

1

1

2

0

1

1

8

Salazar-Martinez, 1999

1

1

0

0

2

1

1

1

7

Parazzini, 1998

1

1

0

0

2

1

1

1

7

Kalandidi, 1996

1

1

0

0

2

1

1

1

7

Shu, 1993

1

1

1

0

1

1

1

1

7

Koumantaki, 1989

1

1

0

0

0

1

1

1

5

Kelsey, 1982

1

1

0

1

2

1

1

1

8

Baron, 1986

1

1

0

1

0

1

1

1

6

Castellsague, 1993

1

1

1

0

2

1

1

1

8

Dahlgren, 1991

1

1

1

0

0

1

1

1

6

Damon, 1960

1

1

0

1

0

1

1

1

6

Elwood, 1977

1

1

1

0

1

0

1

1

6

Fox, 1970

1

1

1

0

1

1

1

1

7

Garnet, 1958

1

1

0

1

0

0

1

1

5

Henderson, 1983

1

1

1

0

1

1

1

1

7

Hirose, 1996

1

1

0

1

2

0

1

1

7

Hosono, 2011

1

1

0

1

2

0

1

1

7

Jaakkola, 2011

0

1

1

1

1

1

1

1

7

Kakuta, 2009

1

1

0

1

2

0

1

1

7

Lawrence, 1989

1

1

1

0

2

1

1

1

8

Lesko, 1991

1

1

0

1

2

1

1

1

8

Levi, 1991

1

1

0

1

0

1

1

1

6

Littman, 2001

1

1

1

1

2

1

1

1

9

Macdonald, 1977

1

1

1

1

1

1

1

1

8

Newcomer, 2001

1

1

1

1

1

1

1

1

8

Pettersson, 1986

1

1

1

1

2

1

1

1

9

Spengler, 1981

1

1

1

1

1

1

1

1

8

Wynder, 1966

1

1

0

1

0

1

1

1

6

Wang, 1990

1

1

0

1

2

1

1

1

8

Hachisuga, 1998

1

1

0

1

2

1

1

1

8

Brons, 2015

0

1

1

0

1

1

1

1

6

La Vecchia, 1984

1

1

0

1

1

1

1

1

7

Salmi, 1979

1

1

1

0

2

1

1

1

8

Asakura, 2009

1

1

1

1

2

0

1

0

7

Hao, 2009

0

1

1

1

2

0

1

1

7

  1. 1 means study adequately fulfilled a quality criterion (2 for case-control fully matched and adjusted), 0 means it did not. Quality scale does not imply that items are of equal relevant importance.